Defensive publication



DEFENSIVE PUBLICATIONT UNITED STATES PATENT OFFICE Published at therequest 01' the applicant or owner in accordance with the Notice of Apr.11, 1968, 849 0.G. 1221. Identiflcation is by serial number of theapplication and the heading indicates the number of pages ofspecification, including claims, and of sheets of drawing contained inthe application as originally filed. The file of this application isavailable to the public for inspection; reproduction may be purchasedfor 30 cents per sheet.

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PUBLISHED SEPTEMBER 2, 1969 816,1682,2,4,4-TETRAALKYL-S-THIOXOTHIOBUTYR- AMIDES AND DERIVATIVES THEREOFEdward U. Elam and Herman E. Davis, both of R0. Box 511, Kingsport,Tenn. 37662 Continuation of application Ser. No. 586,052, Oct. 12,

application Apr. 9, 1969. Published Sept.

Int. Cl. C07c 153/05 US. Cl. 260-551 No Drawing. 12 Pages Specification2,2,4,4-tetraalkyl-3-thioxothiobutyramides, having the formula in whichR R R and R taken singly, is alkyl and in which R and R when takencollectively with the carbon atom to which they are attached, and R andR when taken collectively with the carbon to which they are attached,represent alkylene groups completing a saturated carbocyclic ring; Rwhen taken singly, is alkyl or aryl, and R when taken singly, ishydrogen, alkyl or aryl; R and R when collectively taken with thenitrogen atom to which they are attached, represent a saturatedheterocyclic ring, which are useful as epoxy polymeriza-tion catalysts,are prepared by reacting a 4-alkylidene-3,3-dialkyl-2-thietanethionewith an amine. The use of primary amines in the above reaction alsoproduces 2,2,4,4-tetraalkyl-3-iminothiobutyramides of the formula 1 R1ll r R s R H( :cic ;0-N

i R4 o and iminothiobutyramides of the formula 1 R I l R s H H t 'i N 112 I II! \R7 wherein R is alkyl or aryl. The2,2,4,4-tetraalkyl-3-thioxothiobutyramides may form dimers of theformula or be oxidized by air to3,3(dithio)bis[2,2,4,4-tetraa1ky13-buteneamides] of the formula R B3 SR5 R JZ=CAI( EN

